Edmund chadwick



No. 622,I|7. Patented Mar. 28, |899. E. IIHADWIGK.l

vAcuum vALvE.

(Application led Dec. 28, 1898.)

(No Model.)

tion.

'New STATES rtree.v

PATENT VACUUM-VALVE.

SPECIFICATION forming part of Letters Patent No. 622,1 17, dated March 28, 1899.

Application tiled December 28, 1898. Serial No. 700,538. (No model.)

o t2/Z whom, it may concern:

Be it known that I, EDMUND OHADWICK, engineer and patent agent, a subject of the Queen of England, residing at S0 St. Georges road, Bolton, in the county of Lancaster, England, have invented certain new and useful Improvements in Vacuum-Valves, of which the followingis a specication.

This invention relates to an improved vacuum-valve for steam-engines and other purposes--such as steam-pipes, exhaust-pipes, drying-cylinders, and` the like-and :is designed for the purpose of destroying vacuum immediately steam is shut off from a steamcylinder, thereby facilitating the stoppage of an engine and preventing Water being drawn into the steam-cylinder and other parts leading thereto and therefrom; and it consists of.

a metallic casing or valve-box in which is disposed a seating on which sits a valve provided with guides or wings to insure of the same maintaining its correct working posi- The valve is provided with an elongated projection having an opening or slot to receive the hooked end of an outside arm or stay, the other endof the latter being provided with a threaded boss in which is located an adjustingscrew provided with a lock-nut or its equivalent to operate in connection with the outer end of a spindle, the latter being provided almost its entire length or otherwise with grooves to admit of lubrication, thus forming aliquidjoint. The said spindle is mounted in a cylinder disposed above the before-mentioned metallic casing or valve-box. The lower end of the metallic casin g or valve-boxis provided with a screwed nipple or its equivalent for connecting the same to the exhaust-pipe or other parts before mentioned. The cylinder is provided with an inlet for steam for the purpose of actuating the piston, which operation' closes the valve, and directly steam-pressure is shut oiE the valve opens and thus destroys the vacuum. vided with stuffing-boxes where necessary.

Figure l is a longitudinal sectional elevation of the improved automatic vacuum-destroyer for steam-engines and other purposes; Fig. 2, an outside elevation of same; Fig. 3,

The casing or valve-bon may be proa transverse section through line A B, and Fig 4. a transverse section through line O D in Fig. 1.

In all the iigures the same letters are employed to indicate corresponding parts.

E is the metallic casing or valve-boXyG, valve-seating; H, valveg-I, guides or Wings; J, elongated projection K, opening or slot; L, hooked end; M, outside arm or stay; N, threaded boss; O, adj Listing-screw P, locknut; R, spindle; S, grooves; T, cylinder; V, nipple, and W steam-inlet pipe.

In the metallic casing or valve-box E is dis-- posed the valve-seating G, on which sits the valve H, provided with the guides or wings Ito insure of the same maintaining its correct working position. The valve H is provided with the elongated projection J, with the opening or slot K to receive the hooked end L of the outside arm or stay M. The other or opposite end to that of the hooked end L of the outside arm or stayM is provided with the threaded boss N, in which is located the adjusting-screw O, secured in kposition by the lock-nut P, the end of the screw O operating in connection with the outer end of the spindle R. The spindle Ris mounted in the cylinder T, disposed above the metallic casing or valve-box E, and the spindlelRis provided almost its entire length or otherwise with the grooves S to admit of lubrication, thus forming a liquid joint. The lower end of the me- -fthe screwed nipple V for connecting the same to the cylinder of a steam-engine, exhaustpipe, drying-cylinders, and the like. The cylinder T is provided with the inlet-pipe W' Vfor admitting steam to actuate the piston or spindle R, which operation closes or forces the valve H on its seat by means of the outside arm or stay M. Immediately steampressure is shut oft from the inlet-pipe W the spindle R and the arm or stay M drop and allow the valve H to fall from its seat Gand admit atmospheric air, which passes through the side openings X in the casing E, then through the open valve-seating G and nipple V to the cylinder of the steam-engine, eX- haust-pipe, condenser, drying-cylinders, and the like it may be attached to, and thus de- IOO outside arm or stay M, the other ond of the latter being provided with the threaded boss N in which is located the adjusting-screw O in connection with the outer end of the spindle R mounted in the cylinder T, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit.

nesses.

EDMUND ciiADWIcK.

lVitnesscsi JAS. STEWART BRoADFooT, JOHN JONES. 

